My favorite argument for the inclusive definition is that the area of a trapezoid formula reduces to the other area formulas under the same conditions that the other quadrilaterals do as subsets of trapezoids.

Did something fun early enough on the internet and got to have his opinions taken seriously forever.

For the remainder problem, I'm well aware of modulo notation, which would be really useful here, but my students are not, and it couldn't figure out how to connect it neatly to a meaningful context for the students. #btc #mathed #mathsky

Here are two tasks I used back to back that worked really well, for my goals for those two days. #btc #mathed #mathsky

Yeah, that definitely seems like a reasonable interpretation to me. I might re-use some of these representations when it comes time to work on the distributive rule.

My plan is to introduce the ways in which I want students to collaborate slowly, over time, rather than all at once.

The activity went very well! Every single student was able to engage with the task and make significant headway without too much work from me. We needed a break from the heavy collaboration we'd been doing over the past while.

Here's a blog post talking about the advantages of using the approach I created for completing the square. I'm hopeful this approach will also work for this similar mathematics.

mathcoachblog.com/2017/06/05/a...

#mathed #mathsky

They'd like someone who has merged academia and industry and can give life and career advice. The event is in English because it will bring young leaders together from around the country.

Is anyone interested in helping out?

This is so funny.

I've created a new streamlined page for my educational consulting services on my website to help schools and educators who are looking for support answering these questions. Check it out here: davidwees.com/services/

Let me know how we can work together!

#mathed #edtech #mathematics

Ooo, thanks for the reminder. I might have forgotten about these.